<template>
    <div class="shopcar-container">
        <div class="goods-list">
            <!-- 商品列表项区域 -->
            <div class="mui-card" v-for="(item,i) in goodslist" :key="item.id">
				<div class="mui-card-content">
					<div class="mui-card-content-inner">
						<mt-switch v-model="$store.getters.getGoodsSelected[item.id]" 
                        @change="selectedChanged(item.id,$store.getters.getGoodsSelected[item.id])"></mt-switch>
                        <img :src="item.thumb_path">
                        <div class="info">
                            <h1>{{ item.title }}</h1>
                            <p>
                                <span class="price">￥{{ item.sell_price }}</span>
                                <numbox :initcount="$store.getters.getGoodsCount[item.id]" :goodsid="item.id"></numbox>
                                <!-- 问题：如何从购物车中获取商品的数量？ -->
                                <!-- 1.我们可以先创建一个空对象，然后循环购物车中所有商品的数据，把当前循环这条商品的ID作为对象的属性名，
                                count值作为对象的属性值，这样，当把所有的商品循环一遍，就会得到一个对象：{ 88:2,89:1,90,3 } -->
                                <!-- item.id是用来删除store中的数据，i是用来删除goodslist中的数据 -->
                                <a href="#" @click.prevent="remove(item.id,i)">删除</a>
                            </p>
                        </div>
					</div>
				</div>
			</div>
            <!-- 结算区域 -->
            <div class="mui-card">
				<div class="mui-card-content">
					<div class="mui-card-content-inner jiesuan">
						<div class="left">
                            <p>总计(不含运费)</p>
                            <p>已勾选商品 <span class="red">{{ $store.getters.getGoodsCountAndAmount.count }}</span> 件，
                            总价 <span class="red">￥{{ $store.getters.getGoodsCountAndAmount.amount }}</span> </p>
                        </div>
                        <mt-button type="danger">去结算</mt-button>
					</div>
				</div>
			</div>
        </div>
    </div>
</template>
<script>
import numbox from '../subcomponent/shopcar_numbox.vue'
export default{
    data(){
        return{
            goodslist:[]  //购物车中所有商品的数据
        }
    },
    created(){
        this.getGoodsList();
    },
    methods:{
        getGoodsList(){  //获取购物车商品列表
        //1.获取到store中所有商品的ID，然后拼接出一个用逗号分隔的字符串
            var idArr=[]
            this.$store.state.car.forEach(item=>{
                idArr.push(item.id)
            })
            //如果购物车中没有商品，则直接返回，不需要请求数据接口，否则会报错
            if(idArr.length<=0){
                return;
            }
            this.$http.get('api/goods/getshopcarlist/'+idArr.join(",")).then(result=>{
                if(result.body.status===0){
                    this.goodslist=result.body.message;
                }
            })
        },
        remove(id,index){
            //点击删除，把商品从store中根据传递的id删除，同时，把当前组件中的goodslist中对应要删除的商品，使用index来删除
            this.goodslist.splice(index,1);
            this.$store.commit('removeFromCar',id)
        },
        selectedChanged(id,val){
            //每当点击开关，把最新的开关状态同步到store中
            this.$store.commit('updateGoodsSelected',{id,selected:val})
        }
    },
    components:{
        numbox
    }
}
</script>
<style lang="scss" scoped>
    .shopcar-container{
        background-color: #eee;
        overflow: hidden;
        .goods-list{
            .mui-card-content-inner{
                display: flex;
                align-items: center;
            }
            img{
                width:60px;
                height:60px;
            }
            h1{
                font-size: 13px;
            }
            .info{
                display: flex;
                flex-direction: column;
                justify-content: space-between;
                .price{
                    color: red;
                    font-weight: bold;
                }
            }
        }
        .jiesuan{
            display: flex;
            justify-content: space-between;
            align-items: center;
            .red{
                color:red;
                font-weight: bold;
                font-size: 16px;
            }
        }
    }
</style>